SPECS:
6061 T6 aluminum construction, CNC machined, Hard coat anodized finish, Compatible with most piston systems, Non free floating, Drop-in installation, No need to remove Delta ring, 1913 Mil-Spec rails. STAR-DI-4 - Pistol length, 4 rails on handguard, Venting holes between rails. STAR-C-EX-AA - Carbine length, Adams Arms piston compatible, M-203 ready, Extended rails wrap around gas block, Clamps to prevent barrel nut rotation, 1913 Mil-Spec rails, Continuous top rail, Weight: 13.6 ounces. STAR-CXR - Extension of the CX-EBR past the front sight, Carbine length plus 2.5 inches in front of front sight base, Free floating, Clamps to barrel nut, Clamped to prevent barrel nut rotation, Form continuous top rail, Weight: 16.0 ounces, Permanent modifications required to install. STAR-M - Fits standard mid-length gas system, 9 inch rail, M203 ready, No need to remove front sight base, Weight: 13.5 ounces. STAR-M-EX-P - Extension of the CX-EBR past the front sight, Carbine length plus 2.5 inches in front of front sight base, Free floating, Clamps to barrel nut, Clamped to prevent barrel nut rotation, Form continuous top rail, Weight: 16.0 ounces, Permanent modifications required to install. STAR-M-EX-AA - Mid- length, Adams Arms piston compatible, Free floating, M-203 ready, Extended rails wrap around gas block, Clamps to prevent barrel nut rotation, Continuous top rail, Weight: 16.0 ounces. STAR-M-EX-EBR - Fits standard mid-length gas system surrounding front sight base, Weight: 18.0 ounces, Permanent modifications required to install.